基于区域CORS的多系统组合PPP定位研究

Multi-GNSS Precise Point Positioning Technique Analysis Based on Regional CORS

传统CORS系统提供的定位服务局限于其覆盖范围之内,当超出覆盖区域时难以获得高精度的定位保障。针对这一问题,提出采用区域CORS系统的增强信息,基于星间单差模型进行多系统组合精密单点定位(PPP),消除了接收机钟差参数,不仅无须使用伪距观测值分离接收机钟差与模糊度参数,而且也无须对伪距观测值建立准确的随机模型,从而简化了数据处理流程,提高了基于区域CORS的PPP可用性。

The positioning service provided by traditional CORS is limited in the network. Hence, it is difficult to en-sure precise results in the ease or rovers out of the network. This paper used the single difference model between satellites to deal with PPP with the enhanced information based on regional CORS. The model can eliminate the receiver clock, h is unneeessacy to use the pseudo range observations to separate the receiver clock and ambiguity parameters,so it is unneeessary to establish an accurate random model for pseudo range observations. Thus the availability of PPP based on the region CORS is improved.